MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
The sample is an RTF document containing OLE object data and specifically triggers critical heuristics for Equation Editor exploitation. The \objupdate directive indicates that the embedded OLE object is forced to activate, which is a common technique for exploiting vulnerabilities like the one in Equation Editor. This suggests the document is designed to exploit a known vulnerability to gain initial execution, likely for a subsequent payload download.
Heuristics 3
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Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITORRTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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OLE object data medium RTF_OBJDATARTF contains 2 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000009bf.binff66aac8748c788315e4305a73f89bc71b51ada12a03a619e72ce24d5d19007b |
rtf-objdata-decoded | RTF \objdata at offset 0x9BF | 1933 bytes |
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